Been using it since it came out actually before as I had a trial can.
It is a really different powder the longer you shoot it the better it shoots, the only thing you have to worry about cleaning if you clean the oil out of your barrel to start with and fire 3 209 to dirty the barrel is the breach plug between the 209 and the touch hole if you have a standard breach plug a 1/8 inch drill will do it works best with a handle or I use a flash light batter screw driver from Walmart.
It is my experience that my best groups start after about 5 shots.
An other point of interest is cleaning when you are done shooting Hoppes #9 mixed 50/50 with alcohol works well so does Montana x cowboy cleaner and Montana X Blackhorn cleaner. Be careful what you put in your barrel for oil as I have found some thing can cause you to have to clean or have accuracy problems, i have had good results with Birchwood Casey Barricade and their synthetic gun oil also Montana X bore treatment. again the best way to get accuracy in the first few shots is a good scrubbing with alcohol before you start. Hope this helps.
PS:If you like it an intend to keep using it [believe it or not there are a few people that don't] then PM me for the mod to greatly reduce the carbon problem.